Method of finishing the edges of leather.



messes,

- P. R. GLASS & H. G. HAL LORAN. METHOD OF FINISHING THE EDGES'OFLEATHER;

APPLICATION FILED 1UNE28, 1913.

J a fa /3,1916; 1,181,758. I lltented 1V 3 Flgl. l4 '8 n 1 l 7 12 Q i 13a 9 fi- Fi s.

- Fig.6.

r V Inventor? I Parley R.Glass y- HenryvG. Hallorun,

M KW Atty's.

having been obtai to one gallon each '15 copal'or Eastlndia' gu"produced jty treating niftratcd or acetelated cellulose with fuse oilor amyl acetate and thereafter dissolving the same in a volatilehydrocarbon such-as ether, acetone, alcohol 5 or amylal'cohol'orpreferably in a iri'ixture of acetone and the solution, ifdesired,

, giving body to the plastic composition and of increasing itsflexibility when, dried. A suitable dye'may also be added to :thesolution whenthe same is to be used upon tan, black or other coloredleather in order that the leather may not show the efiecto'f treat:

ent. While the plastic compositions abovedo scribed *have' been found tobe practical and efficient for the purpose set forth, it is to beunderstood, however, that our invention is; not limited to theseproducts, but includes any plastic material having the properties ofbeing leather adherent and contr -active. upon drying, the particularcompositions to which reference has been :made being illustrative butnot restrictive.

; In finishing the edge by our processit is not necessary that the edgebe wholly curled under ,as'illustrated in the drawing, In many casesitwill be found suflioient if the edge is slightly curled inasmuch as theplastic composition is of a water repellent 40 character and adaptedperinanently to retain-theedge ofjthe leather in its rounded form.' I

While the treatment of the skived edge ofzthe leatl r with a contractiveplastic composition asf aboyevdescribed isordi'narily su'llicie'nt toproduoea perfect finished edge, it is found that some classes of leather'are- 'less'susceptible to, the fcontractive action or the plasticcomposition, and that in others so there isa lack of uniformity in thecharacter or ',a variation-,inporosity of different portions of the samepiece'.- In such cases the" alinement'and the uniform curvature of thefinished edge may be insured by applying 5 pressureto the'same' by meansof adie or preferably by the, progressive application 'of"'pressure byan edge forming machine. such as that above described, (or by passingthe. edge of the leatherythrough an edge r rounding machine). So far asthe securing of the proper ahnement and curvature of the edgeis-concerned it is not necessary that the tool or wheel 9 of the machinedescribed shall mo a faster than the fried of the leather 55 edge. Butit is frequently desirable to his coiirp'letely 'which consists inslightly skiving the edge the grain side of the 'leatheris use finishthe {edge by hur-nishirigand by the machine described this burnishing'operation is thus performed simultaneously, and bythe same machine which'r'assurcs the gre- (p-tired edge alinementandicurvature.

The treated edge-.mayl'ae subjected-to such pressure either before. theplastic material dried (ii-thereafter, since the plastic compositionabove described is of such character as permanently to adapt itselftothe form gii en it by the pressure applying device.

Having fully described our invention, i

What we claim as new and desire to secure by Letters Patent is:

1. The process of producing arounded,

smooth and "finished edge upon leather,

which consists in slightly skivingthe edg and coating the slr ivedportion with Mott;

tion'of contractive plastic.mater-ial,.fwhereby th skived portionof the"leather islcaused to contract andcurlQ Y 2.,The processofiproducing arounded, smooth and finished --edge upon leather,

fromth'e flesh side, and-coating the skived portion with a solution ofcontractive plastic material, whereby the marginal-portion of caused tocurl toward thefleshside. u v

3,. The process ofproducing" a rounded, smooth and finished edge uponleather, which consists in slightly skivin g the edge, and coating theski ved portionwith-a prep-- aration of water repellent contractive plasi tic material, whereby the marginal portion. of one" side of theleather'is'ca'useitl to curl toward the other side. l. The process ofproducing a rounded, smooth and finished 'edge uponyleather, 1'95Whichfconsists in s'lightly skiving the edge,

coating the shived'portionrwith a solution of contractiveplasticmaterial, whereby the marginal portion of'one, side of theleather is caused to curl toward the other'side, and finally applyingsuitable pressurejto the" edge to insure its alin'emcnt and uniform-ddgree of curvature. y v

55," The process of producing a rounded,- smooth v and finished edge"upon leather, which consists in slightly skiving the edge from; theflesh stemmin the skived portion with a solution of contractiv'e plasticmaterial, whereby themarginal' portion of the graiuside of the'leatheris caused to'curl toward the flesh side, applying suitable pressure tothe edge'to insure its alinement and uniform curvature, andsimultaneously burnishingthe curled portion to complete the finishededge. I A12 6. The process of producing a rounded,

smooth and finished edge upon leather, which consists in slightlystriving the edge," and coatingthe'skived portion with a cellulosesolution which has the property of can 1 which consists in slightlyskiving the edge j from the-flesh: side and coating the skived portionwith a preparation of cellulose dissolved in a mixture of volatilehydro-carons whereby the treated portion is caused to contract upondrying, and the grain side he leather to curl toward the flesh side,9.1Th'e process of producing a rounded, smooth and finished edge uponleather, which consistsfiin slightly skiving the edge from the fleshside and coatingthe 'sk ived portion with a preparation of cellulosedissolved in volatile hydro-carbon, whereby the eated portion is causedtocontract upon di-ying,and the grain side'of the leather to curl towardthe flesh side, and applying alinement and uniform curvature. 7 10. Theprocess of producing a rounded, smooth, and finished edge upon leather,which consists in slightly skiving the edge, 353: coating the skivedportion with a preparationl of cellulose dissolved in volatile hydroicarbon, whereby the treated portion; is

caused' to contract upon drying, and the it grain side of the leather tocurl toward the ,t fiesh side, applying suitable pressure to the edge toinsure its alinement and uniform curvature and simultaneously burnishingthecurledportion to complete the finished edge. I

acting when drying, whereby the marginal portion of the grainside of theleather is smooth and finished edge upon leather,

suitable pressure to the edge to insure its The process of producing arounded,

smooth and finished edge upon leather, which consists in slightlyskiving the edge from the flesh side, coating the skived portion with apreparation of cellulose dissolved in a mixture of volatilehydro-carbons of the alcohol. group, whereby the treated portion iscaused to contract upon drying, and the grain side of the leather tocurltoward the flesh side, applying suitable pressure to the edge toinsure its alinement and uniform curvature and simultaneously burnishingthe curled portion to complete the finished edge. i l

12. The process of producing a rounded, smooth and finished edge uponleather, which consists in slightly skiving the edge, and coating theskived portion with a solutionof cellulose and a resinous gum, where bythe treated portion is caused to contractupon drying and leather tocurl. 13. The process of producing a rounded, smooth and finished edgeupon leather, which consists in slightly skiving the edge, and coatingthe skived portion with a. preparation of celluloid dissolved in acetoneand alcohol, whereby the treated portion is caused to contract upondrying, and the display'side of the leather to curl. V

14. The process of producing a rounded,

the display side of the smooth and finished edge upon leather,

which consists in slightly skiving the edge, and coating the skivedportion with a dyed preparation of celluloid dissolved in acetone andalcohol, whereby the treated Portion is caused to contract upon drying,and the display side of the leather to curl.

In testimony whereof, wehave signed our names to this specification, inthe presence of two subscribing witnesses.

PERLEY R. GLASS.

HENRY G. HALLORAN.

; Witne'sses:

FREDERICK A. TENNANT,

TuoMAs J. DRUMMoND.

